Antifriction roller-bearing for railroad-cars.



No. 642,557. Patented Ian. 30, I900.

1 J. E. NORWOOD. Y I

'ANTIFRICTION ROLLER BEARING FOR RAILROAD CARS.

(Application filed. Apr. 22, 1899.)

(No Modal.)

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UNITED STATES ATENT Orrrcn.

JOHN E. NORWOOD, OF BALTIMORE, MARYLAND, ASSIGNOR TO THE BALTI- MORE BALL BEARING COMPANY OF BALTIMORE CITY, OF 'MARYLAND.

ANTIFRICITION ROLLER-BEARING FOR RAILROAD-CARS.

SPECIFICATION forming part of Letters Patent NO. 642,557, dated J'anuary 30, 1900.

Application filed April 22,1899. Serial No. 714,011. (No model.)

To all whom it may concern:

Be it known that 1, JOHN E. NORWOOD, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Antifriction Roller-Bearings for Railroad- Oars, of which the following is a specification.

This invention relates to an improvement in antifriction roller-bearings for railroadcars.

The object of the invention is to provide an improved antifriction-bearing that will reduce the friction to a minimum when the moving car is rounding a curve and which will require no special preparation of the car bolster or truck.

Figure 1 is a longitudinal section of the box containing the rollers and carried on the carbody bolster and a side view of the bearingplate carried on the truck-bolster. Fig. 2 is an inverted or bottom View of the roller-box and rollers. Fig. 3 is a view of the end of the roller-box. Fig. iis a cross-section of the roller-box and also the bearing-plate. Fig. 5 is a vertical front view of the two bolsters, showing the two roller-boxes and the relation of the parts.

Referring to the drawings, A designates the car-bolster, and B the truck-bolster, which are provided with my improved construction of bearings.

The truck-bolster B carries at each end a bearing-plate O, which in the present instance are secured in position by means of screws or bolts which pass through projecting ears 0, which are integral with said bearing-plates. These bearing-plates O are curved or segment-shaped with respect to the pivot of the truck. The top surface of this bearing-plate is smooth and plain and level. The truckbolster also carries at its center a pivot bearing-plate D of suitable construction, not nec-' essary to minutely describe here, as it forms no part of my present invention.

The car-bolster A on its under side carries at each end a roller-box F, curved or segmentshaped and cored out to form a chamber g, having a closed top, forming an upper horizontal bearing-surface, and an open bottom and occupied by the rollers h, which are slightly tapered from end to end. Each roller has journals h, which take in longitudinal grooves 2', formed in the side walls of the chamber g, one being at each side. The j ournals of the rollers rest on the top surface 71: of the lower flange j, which in part forms the groove '5, and the lowermost portion of the body of the rollers project down through the open bottom below the lower surface of the box F. The top surface is of the flange j inclines from each end to the center of the box, where said top surface is lowest, as seen in Fig. 1. The journals h travel on this top surface 70 and ordinarily will be free to roll to the center by reason of the incline being lowest at that point.

At one end of the box F is an opening closed by a gate or plate I. The lower edge of this plate sits in notches m, formed on the lower projecting ends n of the box, and the upper part of the plate is confined by a bolt 10, entered into the end of the box. By removing the plate Z the rollers It can be entered into the chamber g,with the journals in the grooves t, and then by restoring the plate the rollers will be confined.

The car-bolster A carries at its center a suitable bearing-plate O, which coacts with the plate D on the truck-bolster. The rollers h hang pendent, and no weight comes on them when the car is on a straight level track and not until the car tilts slightly, as it does when moving on a curved portion of the track. Then the rollers bear above on the upper horizontal bearing-surface of the box and below on the bearing-plate O and reduce the friction between the moving parts of the truck and the car-body. No strain at all comes on the journals of the rollers. The journals serve merely to sustain the rollers when they are not doing service.

It will be seen that by my construction the rollers hang pendent without touching either the lower or the upper bearings and are only in contact with the bearing-plates when the car tilts slightly, as is the case in rounding curves. This construction overcomes a very serious objection. In devices where the rollers are continually in contact with the bearing-plate the vibrations of said rollers make the bearing-plates rough and uneven, and the rollers themselves get battered and will not roll smoothly.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An antifriction roller-bearing for railroad-cars having in combination a bearingplate, 0, on the truck-bolster; a box, F, secured on the car-bolster above said bearingplatetl1e box being closed at the top and forming an upper horizontal bearing-surface and provided with side supports extending lengthwise of the bore-said side supports inclining from the end to the center; and rollers each having journals-said rollers occupying the chamber and the journals normally resting on the side supports whereby when the load is on the rollers the latter will contact both with the upper horizontal bearingsurface of the box and the lower bearingplate on the truck.

2. An antifriction roller-bearing for railroad-cars having in combination a bearingplate on the truck-bolster a roller-box for the car-bolster which is closed at the top to form an upper bearing-surface but open at the bottom and an end, and provided at saidopen end with projecting lugs having notches, m; a plate closing the open end and having one edge resting in said notches; and rollers each having journals which latter take in the said grooves, said rollers when supporting the load bearing on the upper bearing-surface of the box and the lower bearing-plate on the truck, substantially as described.

In testimony whereof I affix my signature in the presence of two witnesses.

JOHN E. NORWOOD.

\Vitnesses:

THos. O. BAILEY, CHARLES B. l\.[ANN, Jr. 

